Home / 13,287.11-18,335.99-7,318.78

Finding the Fourth Proportional to 13,287.11, 18,335.99 and 7,318.78

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Solution

The fourth proportional to 13,287.11, 18,335.99 and 7,318.78 is: 10,099.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.11 : 18,335.99 = 7,318.78 : x
  2. Step 2: Convert to fraction form
    13,287.11/18,335.99 = 7,318.78/x
  3. Step 3: Cross multiply
    13,287.11x = 18,335.99 × 7,318.78
  4. Step 4: Simplify right side
    13,287.11x = 134,197,049.35
  5. Step 5: Solve for x
    x = 134,197,049.35/13,287.11
  6. Step 6: Final answer
    x = 10,099.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.